最新FCKEditor ASP上传绕过漏洞

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exploiut-db：
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$ @/ R" [& K/ P. s% Z: LFCKEditor ASP Version 2.6.8 File Upload Protection Bypass

- Title: FCKEditor 2.6.8 ASP Version File Upload Protection bypass
7 [6 d0 l$ D2 s. q1 o4 R5 Z- Credit goes to: Mostafa Azizi, Soroush Dalili
- Link:http://sourceforge.net/projects/fckeditor/files/FCKeditor/
- Description:
9 \5 k$ Y8 y' y/ M3 Y+ I- bThere is no validation on the extensions when FCKEditor 2.6.8 ASP version is
dealing with the duplicate files. As a result, it is possible to bypass
4 b+ y) ?9 X6 K6 a, n. O) Y& y" ]the protection and upload a file with any extension.
- Reference: http://soroush.secproject.com/blog/2012/11/file-in-the-hole/
- Solution: Please check the provided reference or the vendor website.
, W3 ]# w- [, L6 U4 c- PoC:http://www.youtube.com/v/1VpxlJ5 ... ;rel=0&vq=hd720
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& U4 C" {8 o2 G3 j; ^Note: Quick patch for FCKEditor 2.6.8 File Upload Bypass:
# L% {5 B' x2 w9 G. A2 bIn “config.asp”, wherever you have:
" Q+ H9 f& N7 C6 j, `8 U. U: P; T      ConfigAllowedExtensions.Add    “File”,”Extensions Here”
Change it to:
      ConfigAllowedExtensions.Add    “File”,”^(Extensions Here)$”

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php测试无效
asp/aspx测试成功：
来到/FCKeditor/editor/filemanager/connectors/test.html
* U4 U" @! ?% a* r/ V因为结合了之前二次上传的漏洞，所以先上传任意内容的文件：asd.asp.txt
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8 ^4 P% m; G8 a3 {: J4 Eburpsuite上传包并修改，repeater
名字改为asd.asp%00txt    然后把%00专为URL编码上传后得到asd(1).asp
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$ Z+ p" l/ O* e2 c如图，webshell为：http://localhost/userfiles/file/asd(1).asp
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